| # RUN: llc -run-pass=livedebugvalues -march=mips -o - %s | FileCheck %s |
| # |
| #"last-instr-bundled.c" |
| #extern void set_cond(int, int*); |
| #extern void do_something(char *,int); |
| # |
| #void foo (int argument) |
| #{ |
| # int condition; |
| # char *string; |
| # |
| # set_cond(argument,&condition); |
| # |
| # if (condition) |
| # do_something(string,argument); |
| #} |
| # |
| # reproduce: |
| # clang --target=mips-linux-gnu -g -O1 -S -emit-llvm last-instr-bundled |
| # llc -stop-before=livedebugvalues < last-instr-bundled.ll > last-instr-bundled.mir |
| # |
| # Check that last bundled instruction of block gets recognized as end of basic block. |
| # CHECK: bb.2.if.end |
| # CHECK-NEXT: DBG_VALUE debug-use $s0, debug-use $noreg, !12, !DIExpression(), debug-location !17 |
| |
| --- | |
| ; ModuleID = '<stdin>' |
| source_filename = "last-inst-bundled.c" |
| target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64" |
| target triple = "mips--linux-gnu" |
| |
| define void @foo(i32 signext %argument) local_unnamed_addr !dbg !7 { |
| entry: |
| %condition = alloca i32, align 4 |
| call void @llvm.dbg.value(metadata i32 %argument, metadata !12, metadata !DIExpression()), !dbg !17 |
| %0 = bitcast i32* %condition to i8*, !dbg !18 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !18 |
| call void @llvm.dbg.value(metadata i32* %condition, metadata !13, metadata !DIExpression()), !dbg !19 |
| call void @set_cond(i32 signext %argument, i32* nonnull %condition), !dbg !20 |
| %1 = load i32, i32* %condition, align 4, !dbg !21, !tbaa !23 |
| call void @llvm.dbg.value(metadata i32 %1, metadata !13, metadata !DIExpression()), !dbg !19 |
| %tobool = icmp eq i32 %1, 0, !dbg !21 |
| br i1 %tobool, label %if.end, label %if.then, !dbg !27 |
| |
| if.then: ; preds = %entry |
| call void @do_something(i8* undef, i32 signext %argument), !dbg !28 |
| br label %if.end, !dbg !28 |
| |
| if.end: ; preds = %if.then, %entry |
| %2 = bitcast i32* %condition to i8* |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %2), !dbg !29 |
| ret void, !dbg !29 |
| } |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0 |
| |
| declare void @set_cond(i32 signext, i32*) local_unnamed_addr |
| |
| declare void @do_something(i8*, i32 signext) local_unnamed_addr |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #1 |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackprotector(i8*, i8**) #2 |
| |
| attributes #0 = { argmemonly nounwind } |
| attributes #1 = { nounwind readnone speculatable } |
| attributes #2 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "last-inst-bundled.c", directory: "/") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{!"clang version 6.0.0 "} |
| !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{null, !10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !{!12, !13, !14} |
| !12 = !DILocalVariable(name: "argument", arg: 1, scope: !7, file: !1, line: 4, type: !10) |
| !13 = !DILocalVariable(name: "condition", scope: !7, file: !1, line: 6, type: !10) |
| !14 = !DILocalVariable(name: "string", scope: !7, file: !1, line: 7, type: !15) |
| !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 32) |
| !16 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) |
| !17 = !DILocation(line: 4, column: 15, scope: !7) |
| !18 = !DILocation(line: 6, column: 3, scope: !7) |
| !19 = !DILocation(line: 6, column: 7, scope: !7) |
| !20 = !DILocation(line: 9, column: 3, scope: !7) |
| !21 = !DILocation(line: 11, column: 7, scope: !22) |
| !22 = distinct !DILexicalBlock(scope: !7, file: !1, line: 11, column: 7) |
| !23 = !{!24, !24, i64 0} |
| !24 = !{!"int", !25, i64 0} |
| !25 = !{!"omnipotent char", !26, i64 0} |
| !26 = !{!"Simple C/C++ TBAA"} |
| !27 = !DILocation(line: 11, column: 7, scope: !7) |
| !28 = !DILocation(line: 12, column: 5, scope: !22) |
| !29 = !DILocation(line: 13, column: 1, scope: !7) |
| |
| ... |
| --- |
| name: foo |
| alignment: 2 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| tracksRegLiveness: false |
| registers: |
| liveins: |
| - { reg: '$a0', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 32 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: true |
| hasCalls: true |
| stackProtector: '' |
| maxCallFrameSize: 16 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: |
| stack: |
| - { id: 0, name: condition, type: default, offset: -12, size: 4, alignment: 4, |
| stack-id: 0, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| - { id: 1, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4, |
| stack-id: 0, callee-saved-register: '$ra', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| - { id: 2, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4, |
| stack-id: 0, callee-saved-register: '$s0', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| constants: |
| body: | |
| bb.0.entry: |
| successors: %bb.2(0x30000000), %bb.1(0x50000000) |
| |
| $sp = ADDiu $sp, -32 |
| CFI_INSTRUCTION def_cfa_offset 32 |
| SW killed $ra, $sp, 28 :: (store 4 into %stack.1) |
| SW killed $s0, $sp, 24 :: (store 4 into %stack.2) |
| CFI_INSTRUCTION offset $ra_64, -4 |
| CFI_INSTRUCTION offset $s0_64, -8 |
| DBG_VALUE debug-use $a0, debug-use $noreg, !12, !DIExpression(), debug-location !17 |
| $s0 = OR $a0, $zero |
| DBG_VALUE debug-use $s0, debug-use $noreg, !12, !DIExpression(), debug-location !17 |
| DBG_VALUE debug-use $sp, 0, !13, !DIExpression(DW_OP_plus_uconst, 20), debug-location !19 |
| JAL @set_cond, csr_o32, implicit-def dead $ra, implicit $a0, implicit $a1, implicit-def $sp, debug-location !20 { |
| renamable $a1 = LEA_ADDiu $sp, 20 |
| } |
| renamable $at = LW $sp, 20, debug-location !21 :: (dereferenceable load 4 from %ir.condition, !tbaa !23) |
| DBG_VALUE debug-use $at, debug-use $noreg, !13, !DIExpression(), debug-location !19 |
| BEQ killed renamable $at, $zero, %bb.2, implicit-def $at, debug-location !27 { |
| NOP debug-location !27 |
| } |
| |
| bb.1.if.then: |
| successors: %bb.2(0x80000000) |
| |
| JAL @do_something, csr_o32, implicit-def dead $ra, implicit undef $a0, implicit $a1, implicit-def $sp, debug-location !28 { |
| $a1 = OR killed $s0, $zero, debug-location !28 |
| } |
| |
| bb.2.if.end: |
| $s0 = LW $sp, 24, debug-location !29 :: (load 4 from %stack.2) |
| $ra = LW $sp, 28, debug-location !29 :: (load 4 from %stack.1) |
| PseudoReturn undef $ra, debug-location !29 { |
| $sp = ADDiu $sp, 32 |
| } |
| |
| ... |